Electromagnetic motor



Jail. 12, 1932.- l. B. WINSOR ET AL 1,840,993

ELECTROMAGNETIC MOTOR Filed Dec. 15. 1929 2 Sheets-Sheet l uv VENTpR /rm/7 B. M0301" B y a M0 8060/ A TTORNEB Jan. 12, 1932. l. a. WINSOR ET AL ELECTROMAGNETIC MOTOR Filed Dec. 13. 1929 2 Sheets-Sheet 2 A TTOlNE Y Patented Jan. 12, 1932 Y entree STATESPATENT OFFICE IRwiN B. wmson Ann Moses A. DEAL, or TULSA, OKLAHOMA; sAInDEnL ASSIGKOB r sen) wmson ELEq'rRoMAeNETIo MOTOR Our invention relates to electro-magnetic motors of the reciprocating type includingswitch mechanism for controlling the motor and other intermittently actuated electrical apparatus which may beoperated thereby; theprincipal object of the invention being to prevent formation of electrlc arcs 1n the switch mechanism incident to the opening.

and closing of the electric circuit, thereby permitting the use of comparatively high voltages for increasing the usefulness and elliciency of the motor.

A. further object of the invention is to provide for direct operation of'reciprocatory pumps or similar apparatus from the plunger of the motor.

In accomplishing these and other objects of the invention, we have provided improved details of structure, the preferred form. of

which is illustrated in the accompanying drawings, wherem Fig. 1 is a perspective view of the motor 7 connected iucircuit with complementary control apparatus. a

Fig. 2 is a central, longitudinal section through the motor showing the reciprocating plunger at one end. of its stroke, and. the switch mechanism closed for reversing the stroke. i

Fig. 3 is a transverse section on the line 33, Fig. 2, showing the arrangement of the switch contact members on their supporting plates. I 7

Fig. 1 is an enlarged transverse section through one of thesolenoid units of the motor on the line 2.

Fight? is an enlarged section on the line a circuit diagram showing the osed, with the plunger at the end 2 as shown in Fig. 2. n o '11 detail tothe drawings: v

and for the mounting and 6. andsupported by of standards 18- a Each 01?. stanirards .3 includes a kid semi-circular scatS forming a saddle. toremotor including an insuf posite ends with pairs ceive the tubularhousing members 9 and 10 of the solenoid-units 5 and 6, and extending laterally from the standards are ears l1 for attaching clamp members v12 to secure the housing members in their seats and in axial alignment on the base, the clamping members being secured by bolts 13 extending through the ears 11.

The housing members 9 and 10 are identical in construction, each including inwardly facing head portions 14 havinga central bore 15 communicating with an enlar ed bore 16. The bores 16 are threaded at their outer end for receiving removable disks or closure members 17, as shown in Fig. 2.

Formed on theinner sides of the closure members 17 are concentric bosses 18 having 20 and 21 in the housing members 9 and lO,

respectively. p y

The spools 20 and 21 are constructed of nonmagnetic material and include sleeve portions 22 fitted with magnetic end'flanges 23 abutting respectively with the head portions noid coil 31 wound on the spool 21 and. with a demagnetizing coil 32 wound over the coil 31. The coil 32-is wound reversely to the coil 31, and when energized by the flow of electric v current, is adapted for neutralizing. the elece tro-magnetic force of the solenoid coil 31", as

later described in the operation of the motor-I The outer end of the spool member 21 pref- V .erably protrudes from the closure "member 17 to support a spacerv collar 34 and mounted in the outer end of the spool is a removable plug 35 cooperating with the magnetic section 36 of anarmature or plunger 3'Z'which is reciprocably mounted in the sleeves of the spool. The outer end of the plug member -is provided with a head abutting With 75 14 and with the bosses 18 of the closure memthe spacer collar 34 and its inner end terminates substantially midway of the spool mem her, and is provided with a conical recess to receive the conical end of the plunger section 36; the conical. end of the plunger tending to converge lines of magnetic force toward the axial center of the spool member and increase the power of the magnet. Communicating with the recess 39 is a tlu'ough longitudinal port -11 for rel eving compres sion in the spool member 21 incident to reciprocati on of the plunger.

The plunger 37 also includes a magnetic section 42 slidable in the spool member 20 and connected with the section 36 by a nonmagnetic connector 43. The connector 43 is provided with a reduced threaded end it engaging a threaded opening 45 in the 'ilunger section '36,. and a reduced threaded shank 4-6 extending centrally through a connector mounting plate 47 and engaged in a threaded opening 48 of the plunger section 42: the plate being clamped between the plunger section 4-2 and the shouldered portion of the connector.

Threadedly engaged in an opening 49 in the outer end of the plunger section 42 is a connecting rod 50 projecting from the spool 20 and fitted with an insulator sleeve 51 that is adjustably secured on the rod by a set screw 52 for a purpose later described, the outer end oi the rod being adapted for connection with a pump or like apparatus (not shown) which may be operated by the motor.

Fixed on the sleeve 51 is a metallic contact collar 53 slidable between a pair of stationary contact strips 54.- supported on a pair of insulator brackets 55 extending outwardly from one of the standards 3.

Leading from the contact strips 54 are branch. conduits 56 and 57 connecting with a conduit 58 carrying branch conduits and 60 connected with. a switch 61 includin 1 toe mounting frame 7, now described.

The switch mounting frame 7 includes up per and lower segmental plates 62 and 63 provided with foot portions 64: and 65 secured on the insulator base 2 as shown in Fig. l. The segment plate 62 is offset on its toot portion 64 so that it lies in the plane of the lower segment plate 63 and with its lower edge 66 (Fig. 3) spaced above the upper edge 67 of the segment plate 63 to provide separation of the plates since the plates must be insulated from each other.

Located. on the si es of the segnmntal plates 62 and 63 opposite the mounting plate 4;? a series of radially spaced bosses 68 provided with openings; 69 slid ably receiving carbon contact sets 70 and 71 arranged on their respective plates and f tted with icollars 7 2, electr cally connected with the plates by flexible connectors 7 Located on. the segment plates in radial spaced relation with each of the bosses 68 are paired ears 74: fitted with pins 7 5 preferably riveted in the ears and provided with slots 76 for receiving bent ends of coiled flat springs 77 having free opposite ends 78 resting on the arotruding ends 7!) of the contact members for yieldingly retaining the contactmembers i'or engagement with a contact ring 80 on the plunger 37.

The contact ring 80 is clamped against a shouldered portion 81 of the mounting plate 47 by a clamping ring 82 and is moved by the plunger 37 relative to the segmental plates whereby the sets of contacts in the upper plate are connected with the set in the lower segment plate to close an electric circuit hereafter described.

Connected in circuit with the assembled motor and located on a suitable panel 83 a knife switch 84 connected with a main feed line extending through a conduit 85 and with feed lines in a conduit 86 connected with the conduit 58. Located on the panel with the switch 84 is a rheost-at controller 88 and a relay switch 89 connected to the circuit through wires in conduits 90 and 91.

Referring now to the wiring diagram (Fig. 6) showing the electrical connections for the motor and. its various controls:

92 and 93 designate the main food lines from a source of electrical supply which are connected to the switch 84:. and connected with the feed lines through the switch are branch wires 94: and 95, the branch 9st being connected with the segment plate 62, and the branch 95 in series to certain electric apparatus such as a m otor designated 96 and with the segment plate 63 so that when the ring 80 contacts the carbons an electric circuit is established through the plates to actuate the motor or other apparatus 96. The wire 94: extent through. the conduits 86, 58, 59, Fig. l. and grounded to a bolt 9'? securing the plate 62- to the base, and the wire 95 extend through conduits 86, 58 and branch conduits 98 and 99, and grounded by a similar bolt 100 to the segment 63.

Leading; from the bran-ch 9 is a line 101 connected with the solenoid coil 3i, and leading from the coil. is a line 102 connected with the branch 95 for completing a circuit whorehy electric current may flow through the coil 31 continuously when the knife switch is closed for magnetizing the coil and attractin g the plunger 37.

Connected in circuit with contacts 71 is a line 103 extending through conduits 60. 58. 91 to connect with solenoid coil 104 of the relay switch 89, and with a line 105 leading! to the branch 95 for completing the circuit and energizing the coil. 104 when the contact rin 80 of the distributor switch is engaged with the contacts 70 and 73.. Energizing of the coil 104: closes the relay switch 89 and connects a. line 106 leading from the bran h 94 with a line 107 terminating in the movable contact arm108 of the rheostat controller '88.

Connected with the -resistance-contacts -109- oi the rheostat 88is a line-110fleadingtothe- .,de1nagnetizing coil 32,-which is connected with the line 102 for comp to the branch 95.

Leading from the line 107'is a line 111 connecting the solenoid coil28 in circuit with the demagne'tizing coil 32, whereby the coils 28 and 32 may be simultaneously energized when the contact ring 80- is moved into engagement with the contactsand 71 for closing the relay switch 89 connecting the gagement of thecontact ring from the con tacts 70 and 71 as theplunger moves toward the magnet 28, thereby maintaining the solenoid coil 28 and dcemagnetizing coil 32 in a closed circuit for completing the plunger stroke. The stroke of the plunger may be determined bythe location of'the'collar53 on the plunger relative to the outward ends of the contact strips for as soon as the collar leaves the contact strips the circuit in theholding coil is broken which opens the relay switch and de-energizes the magnet 28.

Connected with the'lines 106 and 107 across the relay switch 89 is a fixed condenser 114 for preventingelectric flashesor arcs between the contacts of the relay switch when the motor is in operation' Vith the motor constructed and assembled as described, its operation is as follows:

position indicated in Figs. 2 and 6, the knife switch'84 is closed, ene'rgizing'the coil 31 through the lines 94,101,102 and Current also flows through the contacts 70 and 71, en-

ergizing the relay coil 104 to close the relay switch 89 which energizes thecoil 28 through current in lines 94, 106, 107, 111 and 102, and the coil 32 is energized by current flowing through lines 94,106, and107,}rheostat88, wires 110, 102 and 95; The rheostat controller arm 108 is then moved from the contact point 109 of greatest resistance to a point of less'resista-nce for decreasing the resistance to the flow of electric current to the demagnetizing coil 32, consequently increasing the demagnetizing influence of the coil 32 over the constantly energized solenoid coil31."

Since the magnetic force'in the solenoidcoils 28 and 31' is equal when the rhe'ostat arm- In starting the motor with the parts in the y 108 is engaged With the contact point 109 a of the greatest resistance, it is apparent that the equalmagnetic forces exerted at; opposite ends of-the plunger will prevent longitudinal 'movement of the plunger in either direction,

butwhenthe arm 108is shifted to a point of less resistance, the increased'fiow of electric current to the demagnetizing coil 32 demagnetizes and reduces the magnetic force of the solenoid coil 31 toapoint below the force ofthe solenoid coil 28, so that the greater attractingforce of the coil 28 causes the plunger to be drawn from the coil 31.

During theinitial movement of the plunger 37 toward'the solenoid coil 28, the

contact ring 80 is disengaged from the con-l tacts 70 and 71, consequently breaking the circuit to electrical apparatus 96.

Simultaneously with the breaking of the circuit through the line 94, the circuit through the solenoid coil104 of the relay switch 89 is" also broken; however, the holding coil 1-13 remains in aclosed circuit as the contact collar 53 slides between the contact strips 54, and serves to. supplant the coil 104 for retaining the relay switch closed until the collar 53 emerges from its engagement with the contact strips to break the circuit.

When the contact collar 53 is disengaged from the contact strips, the relay switch 89 opens, causing the circuits to the solenoid coil 28*and demagnetizing coil 32 to be openedathereby de-energiz-ing the coils and perrmttmgthe energized solenoid coil31 to reverse the movementof the plunger 37.

the plunger 37 moves toward the solenoid coil 31, the contact collar ,53' reengages the contact'strips 54 and the contactring 80 reengages the setsof contacts 70 and 71 at theend of the stroke, reestablishing the circuits to the coil 104 of the relay switch 89 and to the electrical apparatus 96.

As thecircuit is closed tothe coil 104 of therelay switch, the switchis closed for re establishing the circuit to the solenoid coil 28 anddemagnetizing coil 32 for again reversing the'stroke of the plunger as heretofore described.

By providing the non-magnetic spacer collar 34 between the head 38 of'the plug 35 and the closure member 17- of the housing 10, a magnetic leakage is efi'ected between the head 38- and' the closure member 17 of the housing for decreasing the magnetic force bet-ween the inner end of the plug and the head 40 of the plunger section 36 for accelerating disengagement of thecontact ring'from the'nlunger stroketoward the solenoid coil'28.

' Iii regulating the stroke of the plunger 3-7, V

the contact collar 53 is adjusted on the connecting rod 50 of the plunger relative to the ing the contacts 70 and 71 during the reversal of It will i ."cut that the reciproweed or the U i plunger may be increased by shortening of the plunger stroke, and correspondingly reduced by lengthening of the stroke.

From the fore ing description, it -'ill be the multiple contacts of the itch adapt the motor for use :nparatively high volt; es and renthe motor l ghly eliicic. for control- .4; electric sio or the like,

n and useful for direct operation of pumps or other similar appa r tus. I at we claim and desire to secure by Letters Patent is:

l. A motor of the character described, including a solenoid, an armature operable by the solenoid, an electric circuit for encr j the solenoid, a relay circuit :for con- .g the energizing a switch opie by tile armature to initially close the circu t for clcsin the energizing cirus for ll'lthilbilllllllg the solenoid cloev i during reciprocation of the ari'nature.

etc-r of the character described ini-indulge" a noil. an armature operable by the solenciu, an electric circuit for encrgizing the solenoid, a relay circuit for controlling the energizing circuit, a switch pemble by the armature for initially closing -tlie relay circuit, and a second switch controlled by the armature for maintaining the rein-7 circuit closed during reciprocation of the armature.

inagnetizing the other magnet, a relay cona no trolling the circuit containing the demagnetizing coil, a switch operable by the plungor for initially closing the relay circuit, and a second switch controlled by the plunger for maintaining the relay circuit closed during movement of the plunger.

A motor of the character described ineluding an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a relay controlled switch in the circuit, a circuit for operating the relay, a set of contacts connected with a source of current supply, a second set of contacts connected with the relay circuit, and a contactor on the plunger to connect the contacts and energize the relay for closing the energizing circuit to move the plunger in one direction, and means for moving the plunger in the opposite direction.

6. A. motor of the character described including an clcctromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a relay circuit for controlling the magnet circuit, a set of contacts connected with a source of current supply, a second set of contacts connected with the relay circuit, a contactor on the plunger to connect the contacts to energize the relay for energizg the magnet circuit to move the plunger in one direction, and means for moving the plunger in the opposite direction.

7 A motor of the character described including an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a switch in the circuit, a relay circuit for the switch, a set o'l contacts connected with a source of current supply, a second set of contacts connected with the relay circuit, and a contractor on the plunger adapted to connect the contacts and energize the relay for closing the circuit to the magnet to move the plunger in one direction, and electrically operated means for moving the plunger in the opposite direction.

8. A motor of the character described in cluding an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a relay controlled switch in the circuit, a circuit for operating the relay. a set of contacts connected with a source of current supply, a second set of contacts connected with the relay circuit, and a contactor on the plunger to connect the contacts when the plunger moves in one direction for initially energizing the relay to close the mag not circuit to move the plunger in the opposite direction, means including a second contactor operable by the plunger for holding the relay switch closed durmg actuation of the plunger, and means for returning the plunger to again re-establish current through the sets of contacts.

9. A motor of. the character described ineluding an electromagnet, a plunger reciprocable by the magnet, a circuit for energizspaced plates adjacent the plunger and connected in the relay circuit, contacts carried by the plates, a contactor on the plunger adapted to connect the contacts to energize the relay for closing the magnet circuit to move the plunger in one direction, and means,

for moving the plunger in the opposite direction. c

10. A motor of the character described including an electromagnet, a plunger operable by the magnet in one direction, a circuit for energizing the magnet, a relay controlling the magnet circuit, sets of contacts in the relay circuit, a contactor on the plunger to connect the sets of contacts for initially energizing the relay circuit for energizing the magnet circuit to move the plunger, a second contactor operable by the plunger for maintaining the magnet circuit closed during actua: tion of the plunger, and means for moving the plunger in the opposite direction.

11. A motor of the character described including an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing V the magnet, a relay controlled switch in the circuit, a relay circuit for operating the switch, spaced plates adjacent the plunger and connected in the relay circuit, contacts yieldably supported by the plates, and a contactor on the plunger to connect the contacts for energizing the relay to close the magnet circuit for moving the plunger in one direction, and means for moving the plunger in the opposite direction.

12. A motor of the character described including an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a switch in the circuit, a relay circuit for operating the switch, spaced lates adjacent the plunger and connected in t e relay circuit, contacts slidable'in the plates, means for urging the contacts in one direction, and a contactor on the plunger to conture moved in one direction by said solenoid, means for moving the armature in the opposite direction, a circuit for demagnetizing said solenoid to, permit movement of the armature in said opposite direction, a relay controlling the demagnetizing circuit, and a switch operable by the armature for controlling said relay.

15. A motor of the character described including a magnetizing solenoid, an electric circuit for energizing the solenoid, an armature moved in one direction by said solenoid, means for moving the armature in the opposite direction, a circuit for demagnetizing said solenoid to permit movement of the armature in said opposite direction and including a rheostat to control the beginning of said movement, a relay controlling the demagnetizing circuit, a switch operable by the armature for initially closing the relay'circuit, and a second switch controlled b the armature for maintaining the relay circuit closed during movement of the armature.

16. A motor of the character described including a magnetizing solenoid, an electric circuit for energizing the solenoid, an armature moved in one direction by said solenoid, electrically operated means for moving the armature inthe opposite direction, an electric circuit including a demagnetizing coil surrounding said solenoid to permit movement of the armature in said opposite direction, a relay controlling the demagnetizing circuit, and a switch operable by the armature for controlling said relay.

In testimony whereof we aflix our signatures.

IRWIN B. WINSOR. MOSES A. DEAL.

nect the contacts and energize the relay cir- A cuit for closing the magnet circuit to move the plunger in one direction, and means for moving the plunger in the opposite direction.

13. A motor of the character described, an electromagnet, a plunger reciprocable by the magnet, a circuit for energizing the magnet, a relay controlled switch in the circuit, a circuit for operating the relay, a contact member connected with a sourceof current supply, a second contact member connected with the relay circuit, and a contactor on the plunger to connect the contact members and energize the relay circuit for closing the energizing circuit to move the plunger in one direction, and means for moving the plunger in the opposite direction.

14. A motor of the character described in-- cluding amagnetizing solenoid, an electric 

